does milling a head change valve adjustment specs?

bleh, i get my head milled, can i adjust valves to stock specs and be all right or will i have to adjust them to something other than stock specs?

 

milling a head will not change your valve adjustment specs. it WILL however change the cam-to-crank clearance and make you get adjustable cam gears.

 

awesome, how do you measure the cam to crank clearances?

 

It will decrease the distance between the crank and cams. The timing belt remains the same length, retarding the cams 1deg for every .012" off the head or block. So for every .012" removed, you advance the cams 1deg to get back to true "0". What you need to worry about is piston to valve clearance, which involves either check springs or clay.

Check here for how to:
http://www.c-speedracing.com/howto/claymotor/clay.html


[Modified by Sleeper, 8:19 PM 6/21/2002]

 

retarding the cams 1deg for every .012" off the head or block.
so were retarding cool

So for every .012" removed, you advance the cams 1deg to get back to true "0".
now we're advancing?

cam timing is retarded by 1* per .012 correct? the advancement was a typo?



[Modified by TorteX, 3:09 PM 6/21/2002]

 

No, the advance is to correct the retard. So if .012" = -1deg, then adding a degree back would put us at true zero, instead of -1deg.

 

ahh ok cool. so i will be advancing my cam over its stock setting once head is milled

 

adjustable cam gears